As discussed in Critical Beatdown, I don't believe that you should apologize for anything you say in a rap song—especially if someone is demanding an apology.
Obviously, if someone is publicly demanding an apology, they don't have any intention of forgiving you for whatever you supposedly did wrong.
Case in point: Louis CK. He apologized, had a seat for like six months and probably lost tens of millions of dollars in the process. When he attempted to mount a comeback, the #MeToo movement—or what's left of it—threw a collective bitchfit, as if he should never be allowed to resume his career.
They may have seized on Louis trying to get back into comedy to deflect from the fact that Asia Argento sexually abused a kid who played her son in a movie when he was like six years old. I'd have to check the timeline, and it's Friday. And I'm black. And I don't have a job. I might have to take up pot-smoking.
Eminem addressed his remarks on the song "Fall," his beef with Machine Gun Kelly and probably some other BS, in an interview with Sway not unlike that interview Kanye did with Charlamagne Tha God when he was under fire for being a Trump supporter.
It was probably purposely set up to preempt some sort of boycott that might interfere with the comic book movie for which Kamikaze is a tie-in. I remember there was a similar Marvel cross-promotion with Relapse, including an XXL cover. That was a long-ass time ago: comic book movies weren't as poppin', nor were censorship campaigns.
Who ever thought we'd one day be nostalgic for 2009?